U.S. patent application number 16/067475 was filed with the patent office on 2019-01-10 for mattress and piece of sleeping or reclining furniture having a mattress.
This patent application is currently assigned to DEWERTOKIN GMBH. The applicant listed for this patent is DEWERTOKIN GMBH. Invention is credited to KARSTEN GEHRKE, ARMIN HILLE, STEFFEN LOLEY, ALEXANDER TEWS.
Application Number | 20190008283 16/067475 |
Document ID | / |
Family ID | 58584250 |
Filed Date | 2019-01-10 |
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United States Patent
Application |
20190008283 |
Kind Code |
A1 |
GEHRKE; KARSTEN ; et
al. |
January 10, 2019 |
MATTRESS AND PIECE OF SLEEPING OR RECLINING FURNITURE HAVING A
MATTRESS
Abstract
The invention relates to a mattress (30) for a piece of sleeping
or reclining furniture, having at least one sensor (12) arranged in
the mattress (30) for sensing vibrations, motion, and/or sound. The
mattress (30) is characterized in that the mattress has at least
one element for receiving structure-borne sound, to which the at
least one sensor (12) is coupled. The invention further relates to
a piece of sleeping or reclining furniture, in particular a bed
(1), having such a mattress (30).
Inventors: |
GEHRKE; KARSTEN; (Porta
Westfalica, DE) ; HILLE; ARMIN; (Bielefeld, DE)
; LOLEY; STEFFEN; (Osnabruck, DE) ; TEWS;
ALEXANDER; (Bielefeld, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
DEWERTOKIN GMBH |
Kirchlengern |
|
DE |
|
|
Assignee: |
DEWERTOKIN GMBH
Kirchlengern
DE
|
Family ID: |
58584250 |
Appl. No.: |
16/067475 |
Filed: |
December 30, 2016 |
PCT Filed: |
December 30, 2016 |
PCT NO: |
PCT/EP2016/082912 |
371 Date: |
June 29, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47C 19/027 20130101;
G05B 19/416 20130101; A61B 5/4806 20130101; A47C 17/163 20130101;
A61B 5/02444 20130101; A47C 31/00 20130101; A47C 27/00 20130101;
A61B 5/746 20130101; A47C 31/008 20130101; A61B 5/725 20130101;
A61B 5/6892 20130101; A61B 5/0205 20130101; A61B 5/1116 20130101;
A61B 5/1135 20130101; A47C 17/162 20130101; A61B 5/024 20130101;
A61B 5/0816 20130101; A61B 5/6891 20130101; G05B 2219/43196
20130101; A61B 5/1123 20130101; A61B 5/0022 20130101; A61B 5/4809
20130101; A47C 20/041 20130101; A47C 21/003 20130101; A61B 5/002
20130101 |
International
Class: |
A47C 20/04 20060101
A47C020/04; A47C 31/00 20060101 A47C031/00; A61B 5/00 20060101
A61B005/00; A61B 5/113 20060101 A61B005/113 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 30, 2015 |
DE |
20 2015 107 148.5 |
May 24, 2016 |
DE |
10 2016 109 524.9 |
Oct 7, 2016 |
DE |
20 2016 105 633.0 |
Claims
1-17. (canceled)
18. A mattress for a piece of sleeping or reclining furniture, said
mattress comprising: a sensor arranged in the mattress and
configured to detect vibration, movement and/or sound; and an
element coupled to the sensor and configured to receive
structure-borne sound.
19. The mattress of claim 18, wherein the sensor is a piezoelectric
or electromagnetically operating sensor.
20. The mattress of claim 18, wherein the sensor is embedded in a
foam material of the mattress.
21. The mattress of claim 18, further comprising two protective
layers arranged within the mattress, said sensor being positioned
between the two protective layers.
22. The mattress of claim 21, wherein the protective layers
comprise sponge rubber or felt.
23. The mattress of claim 18, wherein the element is a sensor plate
configured for receiving structure-borne sound, said sensor being
connected to the sensor plate.
24. The mattress of claim 18, further comprising a spring core
having springs, at least one of the springs having one end resting
on the sensor or on one of the protective layers, said at least one
of the springs representing the element for receiving the
structure-borne sound.
25. The mattress of claim 18, further comprising an externally
accessible plug contact for contacting the sensor.
26. The mattress of claim 18, further comprising at least two
conductive contact surfaces for contacting the sensor.
27. The mattress of claim 18, further comprising an induction coil
disposed in an outer region and connected to the sensor.
28. A piece of sleeping or reclining furniture, in particular bed,
comprising: a mattress; a sensor configured to detect vibration,
movement and/or sound and integrated in the mattress; and an
element coupled to the sensor and configured to receive
structure-borne sound.
29. The piece of sleeping or reclining furniture of claim 28,
wherein the sensor is a piezoelectric or electromagnetically
operating sensor.
30. The piece of sleeping or reclining furniture of claim 28,
wherein the mattress includes foam material, said sensor being
embedded in the foam material of the mattress.
31. The piece of sleeping or reclining furniture of claim 28,
wherein the mattress has accommodated therein two protective
layers, said sensor being positioned between the two protective
layers.
32. The piece of sleeping or reclining furniture of claim 31,
wherein the protective layers comprise sponge rubber or felt.
33. The piece of sleeping or reclining furniture of claim 28,
wherein the element is a sensor plate configured for receiving
structure-borne sound, said sensor being connected to the sensor
plate.
34. The piece of sleeping or reclining furniture of claim 28,
wherein the mattress includes a spring core having springs, at
least one of the springs having one end resting on the sensor or on
one of the protective layers, said at least one of the springs
representing the element for receiving the structure-borne
sound.
35. The piece of sleeping or reclining furniture of claim 28,
wherein the mattress includes an externally accessible plug contact
for contacting the sensor.
36. The piece of sleeping or reclining furniture of claim 28,
wherein the mattress includes at least two conductive contact
surfaces for contacting the sensor.
37. The piece of sleeping or reclining furniture of claim 28,
wherein the mattress includes an induction coil disposed in an
outer region and connected to the sensor.
38. The piece of sleeping or reclining furniture of claim 28,
further comprising an evaluation unit connectable to the sensor and
configured to process and evaluate a signal of the sensor and to
detect a physiological parameter of a person using the piece of
sleeping or reclining furniture.
39. The piece of sleeping or reclining furniture of claim 28,
wherein the physiological parameter detected by the sensor includes
a heart rate, a respiratory rate, a movement state and/or a snoring
state of the person.
40. The piece of sleeping or reclining furniture of claim 28,
wherein the evaluation unit includes a filter, in particular a
low-pass or band-pass filter for signal processing.
41. The piece of sleeping or reclining furniture of claim 28,
further comprising: an electromotive furniture drive including an
adjusting drive for adjusting a furniture part; and a control
device configured to control the adjusting drive, said evaluation
unit being coupled to the control device or integrated in the
control device.
42. The piece of sleeping or reclining furniture of claim 28,
wherein the evaluation unit is configured to detect and evaluate a
vibration which occurs during actuation of the adjusting drive.
43. The piece of sleeping or reclining furniture of claim 28,
wherein the evaluation unit is configured to determine a
malfunction and/or overload and/or non-loading of the adjusting
drive during operation.
Description
[0001] The invention relates to a mattress for a piece of sleeping
or reclining furniture, having at least one integrated sensor
arranged in the mattress for detecting vibrations, movement and/or
sound and moreover a piece of sleeping or reclining furniture, in
particular a bed, having such a mattress.
[0002] In the clinical field, monitoring devices are known to
monitor the respiration and/or heart activity of a patient while
sleeping in order to intervene in case of alarming cardiac function
and circulatory parameters.
[0003] Meanwhile, devices for monitoring the sleep state based on
physiological parameters for non-clinical purposes are available on
the market. These devices, when placed on a nightstand for example,
record sounds and/or states of movement during sleep by means of
microphones and/or cameras. From the acquired information, a sleep
state is derived whose time course is recorded. The recorded sleep
history can be retrieved and evaluated later. It can shed light on
how deep and restful sleep has been.
[0004] In addition to systems that use camera and/or microphone, a
sensor-based system is known in which a pressure-sensitive sensor
strip is placed over the mattress and in which this sensor strip is
connected to a mobile phone (smartphone), which records the sensor
data. Among other things, a heart rate and a respiratory rate are
derived from the sensor data. A disadvantage of the mentioned
non-clinical systems is that the reliability of the detection
depends greatly on the correct positioning of the monitoring
devices on a nightstand or on the mattress. The reliability and
ease of use of these devices are thus limited.
[0005] From the document U.S. Pat. No. 6,485,441 B2, a system for
monitoring the sleep state is known, in which a number of vibration
sensors is arranged in the mattress, whereby mispositioning or
slippage of the sensors is prevented. However, integrating the
sensors leads to an undesirable reduction (attenuation) of the
received signal strength.
[0006] It is an object of the present invention to provide a piece
of sleeping or reclining furniture and a mattress or an
electromotive furniture drive of the type mentioned, in which at
least one sensor integrated into the mattress has a high
sensitivity and provides signals with a high signal strength.
[0007] This object is achieved by a mattress or a piece of sleeping
or reclining furniture with the respective features of the
independent claims. Advantageous embodiments and further
developments are given in the dependent claims.
[0008] A mattress according to the invention is characterized in
that it comprises at least one element for receiving sound, e.g.
structure-borne sound, airborne sound or movement, with which the
at least one sensor is coupled for detecting vibrations, movement
and/or sound. The sensor thus integrated into the mattress is
protected by its positioning against slipping and also from damage
or other disturbances, thus providing a reliable detection of
vibration, movement and sound. For this purpose, the integrated
element for receiving the sound can be fixedly attached to the
mattress. The mattress also acts as a good transmitter for
structure-borne sound due to its large-area contact with the
person. The integrated element for receiving sound, in particular
structure-borne sound, hereinafter also referred to as
structure-borne sound receiver, absorbs in particular the
structure-borne sound and passes it on to the sensor, so that a
good signal strength is given. The structure-borne sound receiver
is preferably made of a material, which has a higher strength for
example compared to soft materials provided in the mattress, e.g. a
foam material, and thus attenuates the structure-borne sound
recorded from the mattress to a low extent and passes it well to
the sensor. In addition, the structure-borne sound receiver
preferably has a size which clearly exceeds that of the sensor.
[0009] Particularly preferably, the sensor is disposed in areas of
the mattress, which are adjacent to the sound-generating body parts
of the monitored persons, thus for example in the heart/lung area
and in the area of the throat or mouth opening. For example, the
sensor may be arranged on a back region of the mattress, since such
vibrations, movement or sound from the chest region of a person
using the mattress can be detected particularly well, which allow
drawing conclusions about the respiration and circulation of the
person. A positioning of the sensor in a lower half and in
particular in a lower third of the back region is especially
suitable in this regard. Other arrangements may be configured such
that the at least one sensor is arranged centrally in the mattress
or in a middle region of the mattress. The middle or the middle
region means the center of mass or the center of gravity of the
mattress. The special advantage is that turning the mattress has no
effect on the signal quality of the sensor. In this case,
preferably the structure-borne sound receiver can extend up to the
bearing surfaces of the mattress and thus be positioned closer to
the sound sources. For the production of mattresses with special
dimensions such as oversizes, this is also advantageous because the
arrangement of the sensor in the mattress remains virtually the
same from the manufacturing point of view.
[0010] As an alternative to an arrangement centrally in the volume,
an arrangement can also be provided in the center of the area
adjacent to one of the bearing surfaces. Although the mattress can
no longer be used on both sides, it can be turned around its
vertical axis.
[0011] The at least one sensor may, for example, be a
piezoelectrically or electromagnetically operating sensor. Such a
sensor operates in a robust manner and is suitable to record both
vibrations (structure-borne sound) and airborne sound, wherein it
is possible to constructively determine the ratio in which these
different types of sound are detected. Another suitable sensor is
an electromechanical sensor, e.g. a micromechanical acceleration
sensor.
[0012] Furthermore, several sound or vibration pickups can be
combined in a sensor or in various sensors, wherein, for example, a
piezoelectrically and an electromagnetically operating sound or
vibration pickup are arranged at the same position or at different
positions. The different sensor types are characterized by
characteristic frequency ranges for which they are particularly
suitable. The combination of different sensor types makes it
possible to analyze a particularly broad frequency spectrum.
[0013] The sensor is embedded, for example, directly or surrounded
by protective layers in a foam material of the mattress. For
example, the sensor may be positioned between two protective
layers, which, for example, comprise sponge rubber or felt.
[0014] In an advantageous embodiment of the mattress, the sensor is
connected to a sensor plate, which acts as an element for receiving
structure-borne sound and thus as an antenna. The element is
preferably an aluminum or steel plate, which absorbs and transmits
sound as far as possible without damping.
[0015] When the sensor is arranged in a spring mattress, at least
one of the springs of the spring core can rest with one end on the
sensor or one of the protective layers surrounding it. This spring
forms in this case the structure-borne sound receiver and acts
advantageously as a kind of antenna, which absorbs the sound or
movement and passes it on to the sensor.
[0016] In advantageous embodiments, the mattress has an externally
accessible plug contact or at least two conductive contact surfaces
for contacting the sensor. In this way the sensor can be supplied
with power. It can also be provided to arrange a signal unit or an
evaluation unit close to the sensor in the mattress. The signal
unit can, for example, comprise a (pre)amplifier for the sensor
signal or other signal-processing elements such as filters. In
addition, the signal unit may include a transmitter in order to
provide in a wireless manner the signals detected by the sensor in
an optionally digitized form. The signal unit can also be supplied
with operating current via the plug contact or the at least two
conductive contact surfaces. An evaluation unit which is present
locally close to the sensor is used for (pre)evaluation of the
measured sensor signals. The functionality of such or an external
evaluation unit will be described in more detail below. Also, an
inductive power and signal transmission via induction coils is
possible. In that case, an induction coil is arranged in the outer
area of the mattress, for example below a cover.
[0017] A piece of furniture according to the invention for sleeping
or reclining (resting), in particular a bed, has such a mattress
with at least one integrated sensor. The advantages mentioned in
connection with the mattress are thus provided.
[0018] In an advantageous embodiment, the piece of sleeping or
reclining furniture further comprises an evaluation unit which can
be connected to the sensor and which is set up for processing and
evaluating the signals of the at least one sensor and for detecting
physiological parameters of the person using the piece of sleeping
or reclining furniture. The recorded physiological parameters are,
for example, a heart rate, a respiratory rate, a state of movement
and/or a snoring state of the person. In order to reliably evaluate
even small signals, the evaluation unit advantageously has a
filter, in particular a low or band pass filter for signal
processing. Alternatively or additionally, a first signal
conditioning can also be effected directly on the sensor, for
example by arranging a signal amplifier and/or an analogously
and/or digitally operating signal filter adjacent to the sensor or
integrated in a sensor housing. A transmission of the measuring
signal to the evaluation unit which is less susceptible to
interference is thus achieved.
[0019] Furthermore, the evaluation unit may have a memory for
storing a time course of the physiological parameters.
Alternatively or additionally, the evaluation unit can be connected
for this purpose to an external memory. In this case, this can
concern a cloud on the one hand, thus for example memory offered by
an external service provider, which is provided decentrally and/or
distributed by servers that are accessible via the internet. On the
other hand, it can also be a so-called personal cloud, where a
storage location is local, e.g. in the form of an NAS (Network
Attached Storage) memory which is reachable within an intranet.
Finally, a mass storage connected directly to the evaluation unit
via a wired connection would also be understood as a cloud in this
sense. Other forms of a wired, or more specifically, a wire-bound
cloud include USB mass memory sticks or memory cards such as SD
cards. These cloud-forming storage elements may be provided at
various locations and components, e.g. also in a PC (personal
computer) or a smartphone as a mobile device.
[0020] The evaluation unit may also have a monitoring device for
comparing the physiological parameters with predetermined limits,
so that in the event that a health hazard to a person is detected,
said person or a further person can be warned.
[0021] At least for this purpose, the evaluation unit preferably
comprises a transmission unit for transmitting the physiological
parameters to a mobile device such as a smartphone, or another
external device. The transmission unit is preferably set up for the
wireless transmission of the physiological parameters to the mobile
device, in particular via a WLAN or Bluetooth transmission link.
When the physiological parameters are transmitted to the mobile
device, a comparison of the physiological parameters with
predetermined limits can also be made in the mobile device. A wired
connection to external units is also conceivable, for example, if
the external unit is a personnel call system in a care home.
[0022] Alternatively, the monitoring device itself may be formed
externally of the evaluation unit and be connected to the
evaluation unit. Such an external monitoring device can, for
example, be formed in a mobile device. The functionality necessary
for this purpose can be provided via an appropriate program
("app"). The external monitoring device may also be part of an
alarm center, for example, in a care facility.
[0023] In a further advantageous embodiment, the piece of sleeping
or reclining furniture comprises an electromotive furniture drive
with adjusting drives for adjusting furniture parts. Furthermore, a
control device for controlling the adjusting drives is provided,
wherein the evaluation unit is preferably coupled to the control
device or is integrated in the control device. In this way,
components of the control device, which are already present in the
electric motor furniture drive, are also used for the evaluation
unit or for the sensor and/or a possibly existing signal unit in
the mattress, e.g. a power supply unit, communication devices
and/or a housing including the connection possibilities. In
addition, a wiring of the sensor is simplified when using the
existing structure of the electromotive furniture drive.
[0024] In a further advantageous embodiment of the piece of
sleeping or reclining furniture, the evaluation unit for the
signals of the sensor is additionally set up for the detection and
evaluation of vibrations and movements that occur during actuation
one or more of the adjusting drives. In this way, the at least one
sensor can be used as a positive secondary benefit in order to
determine a malfunction and/or an overload and/or a non-load of one
or more of the adjusting drives during operation. The determined
statuses point to technical problems of the adjusting drives which
have already occurred or may be imminent, or to incorrect use.
[0025] Since the respective adjusting drive is mechanically coupled
to the furniture components, the sensor is able to detect even the
smallest vibrations and/or noises of the respective adjusting
drive. All signals related in this context are detected by the
evaluation unit and classified by means of suitable filters, e.g.
suitable bandpass filters, as signals of the adjusting drives. The
statements about the wear and/or noise condition of the respective
adjusting drive are stored.
[0026] The invention will be explained in more detail below by
means of exemplary embodiments with reference to the drawings,
wherein:
[0027] FIG. 1 shows a first exemplary embodiment of a sleeping
furniture with a mattress with integrated sensor in a schematic
view;
[0028] FIG. 2 shows a representation of a time dependence of sensor
data;
[0029] FIGS. 3, 4 each show a schematic sectional drawing of a
mattress with an integrated sensor; and
[0030] FIGS. 5-8 each show a schematic drawing for electrical
contacting a sensor arranged in a mattress.
[0031] FIG. 1 shows a bed 1 as an example of a bedroom furniture
with a mattress 30 in a schematic view.
[0032] The bed 1 has at least one support element 2 for receiving
the mattress 30. The bed 1 can be used as a single bed for one
person or be designed as a double bed for several people. The
support element 2 is formed, for example, as a slatted frame, as a
flat support surface or the like and is placed or mounted on a
basic element (not shown here), e.g. a frame with feet.
[0033] In the example shown, the support element 2 has a back part
4 and a leg part 5, which are arranged so as to be movable relative
to a fixed middle part 3 or relative to the base element. This
movable arrangement is realized, for example, by means of a
so-called motion fitting (not shown here). The movement is designed
to be displaceable and/or pivotable.
[0034] The bed 1 shown in this example is equipped with an
electromotive furniture drive. The movably mounted back part 4 and
the leg part 5 are coupled in each case via an only schematically
shown connection 6 to an electromotive adjusting drive 7, 8. Thus,
the back part 4 is coupled to the electromotive adjusting drive 7.
The electromotive adjusting drive 8 is provided to move or adjust
the leg part 5.
[0035] The electromotive adjusting drives 7, 8 are presently
designed as linear drives. The linear drives have one or more
electric motors, wherein each motor is provided downstream with a
speed-reducing gear with at least one gear stage. Another gear, for
example in the form of a threaded spindle gear, can be provided
downstream of the speed reduction gear, which generates a linear
movement of an output member from the rotational movement of the
motor. The last gear member or a further member connected thereto
forms the output member. The output member of the respective
electromotive adjusting drive communicates with the respective
furniture component (back part 4, leg part 5) or alternatively with
a component connected to the base element, so that during an
operation of the electric motor of the respective adjusting drive
7, 8 the movable furniture components 4, 5 are adjusted relative to
each other or relative to the base element.
[0036] The electromotive adjusting drives 7, 8 are connected to a
control device 9. This connection can be formed, for example, as a
pluggable cable connection, which is not shown here. The control
device 9 has an electrical supply unit, which provides the electric
power, e.g. from a power supply network, for the electromotive
adjusting drives 7, 8. For this purpose, the control device 9 is
connectable via a power cord, not shown in this example, to a mains
plug with a mains connection. The mains plug conducts the
input-side mains voltage via the power cord to the electrical
supply unit of the control device 9, which supplies a low voltage
on the secondary side in the form of a DC voltage.
[0037] Alternatively, the control device 9 is provided upstream
with an external mains-dependent power supply with mains input and
secondary-side low-voltage output, which supplies the low voltage
in the form of a DC voltage via the line.
[0038] In an alternative embodiment, the control device is not
arranged in a separate housing, but is integrated in one of the
adjusting drives 7, 8. This adjusting drive then represents a main
drive to which, if necessary, further adjusting drives can be
connected.
[0039] In a further alternative embodiment of an electromotive
furniture drive, the control device can be arranged distributed in
the system, such that each of the adjusting drives 7, 8 itself has
a motor control and comprises a bus communication interface via
which the adjusting drives 7, 8 are connected to each other and to
other components. In this case, it can be provided that at least
one of the adjusting drives 7, 8 has its own power supply unit for
its power supply or for supplying several or all existing adjusting
drives and/or possibly further system components.
[0040] A handset 10 is provided which has control elements with
which the electromechanical adjusting drives 7, 8 are controllable
via the control device 9. The handset 10 may be connected via a
cable to the control device 9 in an embodiment. Alternatively, the
handset 10 can be provided with a transmission device for a
wireless transmission of signals to the control device 9. The
wireless transmission can be realized by a radio transmission link,
an optical transmission link (e.g. for infrared light) and/or an
ultrasonic transmission link, wherein the control device 9 is
equipped with a respectively corresponding receiving unit. Further
alternatively, the handset can also form the control device for the
adjusting drives, for example, in that the operating current of the
adjusting drives is switched directly via switches of the
handset.
[0041] In the illustrated exemplary embodiment, a mobile device 14
takes over the function of the handset 10. The mobile device 14 may
be in particular a commercially available mobile phone
("smartphone") or a tablet computer. Preferably, a software ("app")
for the function as a handset 10 is installed on the mobile device
14. Control instructions to the adjusting drives 7, 8 can be sent
via a wireless transmission link 11 from the mobile device 14 used
as a handset to the control device 9.
[0042] The wireless transmission link 11 may for example be based
on a WLAN (Wireless Local Area Network) or Bluetooth transmission
path.
[0043] According to the application, a sensor 12 is provided in the
illustrated bed 1, which detects vibrations, movement and/or sound
and is integrated into the mattress 30. In alternative embodiments
of the mattress 30, a plurality of sensors 12 may be provided.
[0044] The sensor 12 is formed for example as a piezoelectric
component or as an electromagnetic or electromechanical component
and is sensitive to vibrations or movements of the base, to or on
which it is fastened. Such vibrations include, in particular,
structure-borne sound. "Movements" shall include in particular
low-frequency vibrations and deflections of the sensor 12 whose
frequency is in the Hertz or sub-Hertz range. in addition, the
sensor 12 may be sensitive to (airborne) sound waves and act as a
microphone in this sense.
[0045] The sensor 12 is connected via a sensor cable 13 to the
control device 9. If needed, a power supply for the sensor 12 is
provided via the sensor cable 13 and signals outputted from the
sensor 12 are forwarded to the control device 9. In an alternative
embodiment, the sensor 12 can be coupled to the control device 9
via a wireless connection, for example a radio link. In this case,
the sensor 12 is provided with its own power supply, for example in
the form of a possibly rechargeable battery.
[0046] The control device 9 comprises an evaluation unit 9' for
processing and evaluating the signals supplied by the sensor 12.
The evaluation unit 9' comprises amplifiers and filter units, for
example, which make it possible to draw conclusions from the signal
transmitted from the sensor 12 on certain body functions of a
person in bed 1. In particular, the evaluation unit is set up to
determine from the signals of the sensor 12 physiological
parameters of the person. Such parameters relate, for example, to
heart and circulatory functions and include, for example, a heart
rate and a respiratory frequency. Furthermore, it can be determined
whether the person in bed is snoring. In addition, movements of the
person are recorded. Details for determining the aforementioned
parameters from the signals of the sensor 12 will be explained in
more detail below in connection with FIG. 2.
[0047] The determined parameters are transmitted either directly or
after intermediate storage in the evaluation unit 9' as wireless
signals 15 to the mobile device 14, which is equipped with
appropriate software ("app"), which allows an evaluation and
preferably graphical representation of the time-dependence of the
determined sleep parameters. WLAN (Wireless Local Area Network) or
Bluetooth can be used again, for example, as a transmission path
for data of the evaluation unit 9'.
[0048] In addition, a comparison of the measured physiological
parameters with predetermined limit values for these parameters can
additionally be provided in the evaluation unit 9' or the control
device 9. If the determined parameters are transmitted directly to
the mobile device 14 during the sleep phase, that is to say without
longer intermediate storage in the evaluation unit 9', then such a
comparison can take place there alternatively or additionally. When
exceeding or falling below the limit values or when one or more of
the parameters leave a predetermined range, it is provided that the
evaluation unit 9' or the control device 9 or the mobile device 14
outputs an alarm signal. This alarm signal can be output visually
and/or acoustically directly from the evaluation unit 9' or the
control device 9 or the mobile device 14. Alternatively or
additionally, it may be provided that the mobile device 14 emits an
alarm message via a further wireless transmission link (e.g. WLAN,
mobile network), which is not shown here. In this way, another
person can be notified if unusual sleeping parameters are
displayed. The illustrated bed 1 or the electromotive furniture
drive with the sensor 12 can thus also be used for clinical
monitoring or for personal monitoring or for monitoring infants to
protect against sudden infant death. For example, an alarm message
may be issued when a person has left the bed, optionally when a
person has left the bed for a predetermined time, or when no
physiological parameters, or only critical ones, are detected.
[0049] Advantageously, the connection between the sensor 12 and the
evaluation unit 9' is arranged within the bed 1, which prevents the
sensor cable 13 from having to be laid outside the bed 1. The
integration of the sensor 12 in the mattress ensures correct
positioning of the sensor 12 at all times and thus reliable
evaluation of the data of the sensor 12. It can be provided to
combine the sensor 12 with the evaluation unit 9' in a structural
unit.
[0050] In the exemplary embodiments of FIG. 1, the evaluation unit
9' for the signals of the sensor 12 is integrated in the control
device 9. Alternatively, it is possible to form the evaluation unit
9' separately from the control device 9 in a separate housing. For
the transmission of the determined physiological parameters, the
evaluation unit 9' can then be electrically coupled to the control
device 9. Also, a use of such a self-sufficient evaluation unit 9'
detached from the control device 9 is possible, especially if a
transmission unit for wireless transmission of the determined
physiological parameters and/or preprocessed signals from the
sensor 12 to the mobile device 14 or another external component is
already present in the housing of the evaluation 9'.
[0051] FIG. 2 shows a detail of a measured signal 20 of the sensor
12 in a diagram. The progression over time t is given in seconds on
the horizontal axis. On the vertical axis, a signal amplitude A is
shown in arbitrary units.
[0052] The illustrated portion of the signal curve of the signal 20
is without movement during a quiet sleep phase and without snoring
of the observed person. A movement of the person manifests itself
in amplitudes, which exceed the illustrated one by a factor of some
10-100. Movements are therefore very easy to identify. Also snoring
and the resulting vibrations are clearly distinguishable from the
signal curve shown, since they are reflected in a multiple greater
amplitude.
[0053] In the course of the signal 20 shown in FIG. 2, regular
peaks 21 which originate from the heartbeat of the person and are
subsequently called heartbeat peaks 21 can be observed. From the
distance of the heartbeat peaks 21, a heart rate can be determined.
The time interval of adjacent heartbeat peaks 21 allows statements
about the pulse uniformity, which can be a measure of the depth of
sleep.
[0054] Furthermore, it can be seen in FIG. 2 that the amplitude of
the heartbeat peaks 21 regularly varies at a lower frequency. This
variation is represented by an envelope 22. The envelope 22 shows
alternating rising flanks 23 and descending flanks 24. The course
of the envelope 22 is correlated with the respiration of the
person. The rising flanks 23 indicate an inhalation phase and the
descending flank 24 an exhalation phase.
[0055] The example of FIG. 2 shows how conclusions can be drawn
from the signals of the sensor 12 on cardiovascular parameters, in
this case on pulse and respiration. In a similar way, further sleep
parameters such as states of motion and snoring can be
determined.
[0056] For evaluating the signals 20, a filtering is carried out of
the raw signals of the sensor 12, in particular by means of a
low-pass filter. The use of a bandpass filter with suitable cut-off
frequencies is also possible. Low-pass or bandpass filters are used
to eliminate interference frequencies. The processing of the
signals preferably takes place with the aid of a digital signal
processor (DSP).
[0057] The sensor 12 may additionally or alternatively also serve
to monitor the correct function of the electromotive drive. An
actuation of the adjusting drives 7, 8 leads to a movement of the
moving furniture parts, for example, of the back part 4 and/or the
leg part 5. In addition, the actuation of the adjusting drives 7, 8
results in vibrations of these furniture parts and also of the
entire furniture, which is also detected by the sensor 12. These
vibrations occur in a typical frequency range. The signal curve
reflects the motor movement of the adjusting drives 7, 8. A first
typically relevant frequency range is in the range of motor speed
of the motors of the adjusting drives 7, 8. In this frequency
range, errors on the motor itself or a driven gear are revealed.
Another typical relevant frequency range corresponds to an integer
fraction according to a gear ratio of the transmission, which is
about 1:30 to 1:50. In this frequency range, errors are indicated
in downstream gear stages or rolling bearings. A third typical
frequency range is in the region of squeaking noises of hinges that
are part of a furniture fitting. Form and amplitude are typical for
the adjusting drive 7, 8 used on the one hand, and they provide
information on the other hand about the correct function of the
adjusting drives 7, 8 and their state of wear.
[0058] An overload of one of the adjusting drives 7, 8 can also be
detected on the basis of the signal shape of the signals of the
sensor 12. The sensor 12 can thus function, for example, as an
anti-pinch protection, wherein the control device 9 stops this
drive or causes it to rotate in the opposite direction when one of
the adjusting drives 7, 8 is overloaded. An underload on the
adjusting drive 7, 8 may also be an indication of pinching, e.g. if
a furniture part (back part 4, leg part 5) is let go arid the
adjusting drive 7, 8 is operated almost powerless, which suggests a
pinching of a body part under the downwardly moving furniture part.
A load-less operated adjusting drive 7, 8 can also be identified
based on the signals of the sensor 12.
[0059] In connection with FIGS. 3 and 4, a possible arrangement of
the sensor 12 in the mattress 30 is shown.
[0060] FIG. 3 shows a cross section through a portion of the
mattress 30 in a first embodiment. The mattress 30 has a cover 31
surrounding a core of foam material 32. Cold foam is used for
example as a foam material 32.
[0061] The sensor 12 is inserted in the illustrated exemplary
embodiment in a lower region of the mattress 30 in a recess which
is introduced into the core of foam material 32. The sensor 12 is
arranged on a sensor plate 12' and fixedly connected thereto, e.g.
by an adhesive bond. The sensor plate 12' hereby serves as a
receiving element (antenna) and absorbs structure-borne sound over
a large area and forwards it to the sensor 12. The sensor plate 12'
may, for example, be an aluminum or steel plate, so it is made of a
hard material that dampens absorbed and forwarded sound as little
as possible. Alternatively, it is also possible to use the hardest
possible plastic as material for the sensor plate 12'.
[0062] In order to ensure protection of the sensor 12 and to
achieve a good acoustic connection of the sensor 12 or the sensor
plate 12' to the foam material 32, the arrangement of sensor 12 and
sensor plate 12' is embedded between two protective layers 33 made
from a likewise yielding material which, however, is stronger than
the foam material. The material of the protective layers 33 may be
made of sponge rubber or felt, for example.
[0063] Of the sensor arrangements shown, preferably several can be
arranged in the mattress 30. Even with relatively small sensor
plates 12', an adequately large accumulated signal strength is then
achieved in total. Smaller sensor plates 12' or sensor arrangements
have the advantage over larger ones that they do not impair the
sleeping comfort of the user. A suitable size of the sensor plates
12' is about 30 to 50 millimeters in diameter or edge length.
[0064] Instead of an arrangement adjacent to one of the bearing
surfaces of the mattress 30, a central arrangement between the
upside or underside of the mattress 30 may be provided, e.g. by
making an incision in the foam material 32 from one of the sides,
whereby a pocket is formed, into which the sandwich of sensor 12
and protective layers 33 is inserted. The incision can be made from
a longitudinal side of the mattress 30. If a sensor 12 is to be
arranged more closely in the head region or in the chest area of a
person at rest, an alternative can be an incision into the mattress
30 from the transverse side.
[0065] FIG. 4 shows the arrangement of the sensor 12 in a mattress
30 formed as a spring mattress. This in turn has a cover 31 which
surrounds an outer layer of a foam material 32. Inside, a spring
core is formed by means of springs 34. In the illustrated
embodiment, the sensor 12 is disposed in the region of the spring
core, wherein one of the springs 34 ends on the sandwich of sensor
12 and protective layers 33. In this way, the corresponding spring
34 acts as a structure-borne sound receiver, i.e. as an antenna,
which receives the acoustic vibrations or movements and forwards
said vibrations or movements to the sensor 12, optionally amplified
in a resonant manner.
[0066] In alternative embodiments, it is conceivable to arrange the
arrangement of sensor 12 and protective layers 33 in a middle
region of the mattress 30 in such a way that a spring 34 acts on
the sensor 12 from above and from below. An arrangement within the
layer of the foam material 32 analogous to the example shown in
FIG. 3 is also possible.
[0067] In a further alternative embodiment, the sensor can be
arranged on the inside in an optionally removable cover of the
mattress. In order to be able to wash the cover anyway, the sensor
can be detachably fixed, z. B. with snaps, a Velcro fastener, a
zipper. Also, accommodation and positioning of the sensor can occur
in a sewed bag, for example.
[0068] In this case, a structure-borne sound receiver, e.g. in the
form of plastic films or plastic elements, may be arranged on the
cover, with which the sensor is connected or can be connected to
the aforementioned fastening means.
[0069] Alternatively, the sensor can also be fixedly coupled to the
structure-borne sound receiver and this can be detachably fastened
to the cover via the said fastening means.
[0070] In all the examples described so far, although the sensor is
coupled to the structure-borne sound receiver, it is otherwise a
unit which is separate therefrom. Alternatively, in all cases shown
or described, both in the arrangement in the core of the mattress
and in the arrangement in the cover, the sensor may be integrally
formed with the structure-borne sound receiver. This can be done as
a sensor based on a polarized plastic, e.g. fluorine-based, which
has piezoelectric properties. The sensor itself can then be formed
in a flat way, possibly reticulated, and in this respect unite the
functions of a two-dimensional structure-borne sound receiver and a
signal-emitting sensor.
[0071] In connection with FIGS. 5 to 8, the electrical contacting
of a sensor 12 arranged in a mattress 30 is illustrated. The
electrical contacting shown in these figures can be used, for
example, in conjunction with the sensors 12 in the exemplary
embodiments of FIGS. 3 and 4. Although only the sensor 12 is shown
in the respective figures, it is understood that said sensor is
coupled to an element for receiving structure-borne sound, e.g. the
sensor plate 12' or the spring 34, as in the exemplary embodiments
of FIGS. 3 and 4.
[0072] From the bed (see reference numeral 1 in FIG. 1), only the
support element 2 is shown, on which the mattress 30 is placed. The
support member 2 can be, for example, a slatted frame or, in
so-called box spring beds, a plate-shaped bearing surface. Instead
of a control device (see reference numeral 9 in FIG. 1), which is
part of an electromotive furniture drive, the evaluation unit 9' is
designed in the present case to evaluate the sensor signals of the
sensor 12 as a separate unit. It is understood that the evaluation
unit 9' may alternatively be integrated into a control unit, which
is not shown here.
[0073] In FIG. 5, electrical contacting of the sensor 12 via a
sensor cable 13 and a plug contact 16 is initially shown. The plug
contact 16 allows decoupling the sensor 12 from the evaluation unit
9', e.g. in order to ventilate or to exchange the mattress 30. The
plug contact 16 is represented symbolically in a unipolar way. It
is understood that in an embodiment of the arrangement shown, a
multipole plug contact 16 can be used, which, if necessary,
provides both a power supply for the sensor 12, as well as
transmits signals of the sensor 12 to the evaluation unit 9'. The
plug contact 16 may be positioned immediately adjacent to the
mattress 30 or also via a cable section of a certain length, which
allows a more flexible contacting on the support element 2 or
another bed component or the evaluation unit 9'.
[0074] A further development of the arrangement of FIG. 5 is shown
in the exemplary embodiment of FIG. 6. In principle, the same
structure of the plug contact 16 is replaced by an array of contact
surfaces 17. The contact surfaces 17 allow a contacting between the
mattress 30 and the evaluation unit 9', without having to insert a
plug manually. The contact surfaces 17 are each positioned on the
support element 2 or the mattress 30 so that when placing the
mattress 30 on the support element 2 an at least two-pole
contacting takes place automatically. Again, separate contacts can
be provided for a power supply and for sensor signals. The contact
surfaces 17 may be arranged directly on the support element 2, or
by means of a carrier element, which in turn is mounted on the
support element 2. The latter offers a simple retrofit option.
[0075] It is also conceivable to both supply the sensor with power
via only two contacts, as well as to transmit the signals of sensor
12 to the evaluation unit 9' in a modulated manner on the power
supply. This is advantageous for the exemplary embodiment shown in
FIG. 7, since the number of contacts that can be integrated
usefully in the mattress or the support unit is smaller than when
using the plug contact 16 of FIG. 5. The reason is that to
compensate for tolerances in the positioning of the mattress 30,
the contact surfaces 17 should have a certain minimum size and a
certain minimum distance. A flexible material, in particular a
conductive textile material, can preferably be used as material of
the contact surfaces. For example, in certain regions in the
mattress 30, a conductive textile, e.g. a textile threaded with a
copper thread, can be used. The (counter-)contact surfaces 17
formed on the support element 2 can then be formed from a hard
conductive surface.
[0076] Another arrangement for transmitting energy and sensor
signals is shown in FIG. 7. In this exemplary embodiment, the
electrical signals are inductively transmitted through induction
coils 18. For this purpose, the primary-side induction coil 18,
which is connected to the evaluation unit 9', is supplied with AC
voltage. The voltage induced in the secondary-side induction coil
18 is supplied to the sensor 12 for power supply. Also in this
arrangement, the sensor signal can be modulated by the sensor 12 as
a high-frequency signal on the current flowing to its supply, which
in turn is also transmitted by the induction coils 18 to the
evaluation unit 9' after similarly inductive transmission. Such a
modulation is also known as power-line modulation.
[0077] FIG. 8 shows a modification of the arrangement according to
FIG. 7. In the exemplary embodiment of FIG. 8, an arrangement of
induction coils 18 is also provided for the power supply of the
sensor 12, which arrangement of induction coils 18 in this
exemplary embodiment is coupled on the primary side to a power
supply unit 9'' which is separate from the evaluation unit 9'.
[0078] A transmission of the signals of the sensor 12 to the
evaluation unit 9' takes place in the form of wireless signals 15
via a radio link. This can be designed, for example, according to
the Bluetooth or ZigBee specification. It is understood that a
division into an inductive power supply of the sensor 12 and a
transmission of the sensor signals as wireless signals 15 is also
possible if no separate power supply unit 9'' is present, but the
power supply unit 9'' is integrated in the evaluation unit 9'. Even
radio links with proprietary transmission protocols are
conceivable.
[0079] Furthermore, the aforementioned features can be combined
with each other. Thus, according to an alternative, not shown, a
mattress 30 with a sensor 12 connected thereto and with an
evaluation unit 9' connected thereto is conceivable. The mattress
30 thus comprises the at least one sensor 12 and the evaluation
unit 9'. In this case, the evaluation unit 9' may be provided in
the vicinity of a zipper of the cover 31. The evaluation unit 9'
can be arranged in the edge region or in the surface region of the
mattress 30.
[0080] In one embodiment, the evaluation unit 9' is designed in
this case to receive at least one electric energy storage unit. A
battery compartment may be provided for example. Preferably, the
evaluation unit 9' has a rechargeable electric energy storage unit
which is particularly suitable for supplying the evaluation unit 9'
for a period of at least 24 hours. The charging of the energy
storage unit takes place in an embodiment according to the
description in connection with the FIG. 7 or 8, wherein in the
mattress 30 or the evaluation unit 9', the secondary induction coil
18 mentioned there is arranged. Due to the aforementioned
embodiment, it is now possible to provide the evaluation unit 9'
with a temporary transmission of electrical energy through the
induction coil 18, which is then intermediately stored by the
electric energy storage unit and is available for the operation of
the evaluation unit 9'.
[0081] In one embodiment, the evaluation unit 9' detects the
presence of a person resting on the mattress 30 and deactivates the
transmission of energy through the induction coils 18. In this way,
energy is saved and a discharge of electromagnetic impurities is
reduced to a minimum. In a further embodiment, the evaluation unit
9' of the mattress detects not only the signals 20 of at least one
sensor 12, but also fully carries out the evaluation of the sensor
signals, e.g. to determine the sleep phases and to analyze the
respective sleep phase, and summarizes after the end of the last
sleep phase all measurement data to one record for wireless
transmission to a mobile device 14 or for transmission in a data
network. For this purpose, the evaluation unit 9' preferably has a
memory which can intermediately store the determined parameters
until transmission to the mobile device 14. In order not to lose
data, even if a transmission does not take place for a long time,
the memory should have a capacity large enough to accommodate data
of several sleep phases, e.g. data of a week. The memory can be,
for example, a non-volatile, rewritable memory, e.g. a flash
memory.
LIST OF REFERENCE NUMERALS
[0082] 1 Bed [0083] 2 Support element [0084] 3 Middle part of the
support element [0085] 4 Back part [0086] 5 Leg part [0087] 6
Connection [0088] 7, 8 Adjusting drive [0089] 9 Control device
[0090] 9' Evaluation unit [0091] 9'' Power supply unit [0092] 10
Handset [0093] 11 Transmission link [0094] 12 Sensor [0095] 12'
Sensor plate [0096] 13 Sensor cable [0097] 14 Mobile device [0098]
15 Wireless signals [0099] 16 Plug contact [0100] 17 Contact
surfaces [0101] 18 Induction coils [0102] 20 Signal [0103] 21
Heartbeat peak [0104] 22 Envelope [0105] 23 Rising flank
(inhalation) [0106] 24 Descending flank (exhalation) [0107] 30
Mattress [0108] 31 Cover [0109] 32 Foam material [0110] 33
Protective layer [0111] 34 Spring
* * * * *